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Editor's Correspondence
November 9, 2009

The Case for Dual Renin-Angiotensin System Inhibition—Reply

Arch Intern Med. 2009;169(20):1931. doi:10.1001/archinternmed.2009.407

In reply

Dr Hirsh raises some interesting points pertaining to our article on dual RAS.1 We agree with Dr Hirsh that the data from the ONTARGET2 trial do not address the issue of patients with proteinuria more than 1 g/d and should not be interpreted to completely dismiss these combinations. However, the available evidence shows that combination therapy with RAS inhibitors is more effective than single RAS blockade in reducing proteinuria, but there is no good evidence that these combinations are more effective than single RAS blockade when it comes to reducing chronic kidney disease progression. The ONTARGET trial should serve as a cautionary reminder that what is expected does not always translate into reality, and further studies are needed before combination therapy are routinely implemented in the treatment of chronic kidney disease.

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